Nacho Cheesy Cheezy Italian Beef sandwich, Chicago Style. We only use 100% pure Vienna Beef for our Italian Beef Sandwiches and Beef Bowls. Sliced thin, marinated in our secret special gravy. Our bread, Gonella Chicago born french rolls are the standard at this Beef Shack ASU restaurant. Bling your ride by adding provolone cheese, peppers, or many others. This really allows you to make it your own. Individual orders or Catering, Beef Shack gets it done!